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Cover of Big Bright Feelings: Milo's Monster
Picture · ages 3–7

Big Bright Feelings: Milo's Monster

Written and illustrated by Tom Percival

Book 6 of 10 in Big Bright FeelingsView the full series

Endlessly rereadable

Milo has the perfect best friend, until his best friend makes a new friend. His jealousy grows into an actual monster. Tom Percival's most honest exploration of the ugly side of friendship, and what to do when you can't control how you feel.

  • Best for3–7
  • FormatPicture
  • Length32 pp
  • Read aloud~6 min
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The vibe

What it’s like.

Style

  • Lyrical
  • Conversational
  • Repetitive

Tone

  • Warm
  • Gentle
  • Heartwarming
  • Thought provoking
  • Inspirational

Themes

On the pagemonster, jealousy, best friend, new friend, sharing

Experience meters

Energy2/ 5
Humour2/ 5
Scariness2/ 5
Peril1/ 5
Wonder3/ 5
Cosiness3/ 5
Emotional intensity3/ 5
Conceptual intensity3/ 5

What’s it about?

The story.

Milo and his best friend are inseparable. Then his best friend makes another friend, and something dark and green and lumpy starts to grow. The monster is Milo's jealousy made visible, a physical presence that follows him around, getting bigger the more he feeds it. Tom Percival's visual device here is particularly effective: the monster is recognisably the feeling rather than something external, and readers will understand what it represents before the book makes it explicit. The resolution asks Milo to face what he's feeling and name it, and shows that naming a feeling is often the first step to loosening its grip. A useful book for the specific situation of a child whose best friend has found another friend, which is one of the more painful and hard-to-talk-about experiences of early childhood. Also useful for conversations about jealousy more broadly, and for children who struggle to understand why they behave badly when they feel threatened.

Fit check

Right for your child?

Where it lands by age

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 3–7
  • Read aloud · 3–8
  • Independent · 5–7

Prose load

Light

Visual support

Very high

Reluctant-reader friendly

Workable

Read-aloud quality

Excellent

Works well for

  • Reading aloud
  • Reading together
Low sensitivityNo content warnings

Nothing in the book is likely to concern most parents. Safe to recommend without preview.

Bedtime suitability

3 / 5 · Workable

Sensitive-child

5 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Jealousy
  • Friendship difficulties
  • Discussion starter
  • Gift book
  • Pshe resource

Avoid if

No common reasons to avoid this one — a rare clean sweep on the sensitivity flags.

Particularly good for children who are…

  • Making friends
  • New sibling
  • Anxiety and worry
  • Being bullied

In the classroom

How it works in school.

Tom Percival's flagship emotional-literacy series — each picture book explores a big feeling (worry, anger, shyness, jealousy and more), making them the go-to PSHE read-alouds.

Classroom role

  • Discussion and empathy
  • Read aloud

Good for teaching

  • Theme

A book children love that happens to support school — never a stand-in for the texts a class is taught with. Reviewed for the classroom · June 2026.

Why it lands

Why they love it.

Why kids love it

The specific recognition is your best friend making a new friend — Milo's jealousy growing into an actual green monster that follows him around, getting bigger every time he tries not to look at it. The Big Bright Feelings for the painful moment a child discovers their best friend isn't only theirs.

  • Being special or chosen
  • Being understood finally
  • Friendship and belonging

Why parents love it

The Big Bright Feelings on jealousy — Milo's friend-shift jealousy externalised as a monster that grows with feeding. Particularly useful for the specific situation of a best friend acquiring another best friend, which is one of the more hard-to-talk-about feelings of early childhood.

  • Conversation starter
  • Bedtime appropriate
  • Quick to read
  • Great writing

In the series

Big Bright Feelings.

10 books · open the series →

About the author & illustrator

Tom Percival.

TP

Tom Percival

Writer & illustrator · United Kingdom

Tom Percival is a British author-illustrator born in Shropshire, best known for the Big Bright Feelings picture-book series, Ruby's Worry, Perfectly Norman, Ravi's Roar, Meesha Makes Friends, The Invisible, which gently externalises children's emotional experiences through visual metaphor. Worry is a small yellow shape that grows larger when ignored; Norman's wings are a bright feathered thing he tries to hide. The books have become a fixture of PSHE / SEL reading in UK schools and parent-led conversations about feelings. Percival also writes the Dream Team chapter-book series and other picture books. His visual style is bright, contemporary and inclusive, and his books are well-suited to children processing anxiety, difference, or big emotions.

More from Tom Percival

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

Cover of Big Bright Feelings: Ravi's Roar
Big Bright Feelings: Ravi's Roar

by Tom Percival

The Invisible Boy
Trudy Ludwig
The Invisible Boy

by Trudy Ludwig

Enemy Pie
Derek Munson
Enemy Pie

by Derek Munson

Come into this from…

Easier or preparing reads — perfect lead-ins.

Where to go next…

Escalation reads — a step up in scale, silliness, or stakes.

Where you’ll find it

On these reading lists.

Buy or borrow

Pick up a copy.

  • Bookshop.org
  • Waterstones
  • Amazon UK
  • Hive
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Last reviewed · April 2026Suggest a correctionHow we recommend

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